The chromosome complements of shrubbyOxalis species from South America |
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Authors: | Daniel de Azkue Arturo Martinez |
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Institution: | (1) Centro de Estudios Farmacológicos y de Principios Naturales (Cefaprin), Serrano 665, 1414 Buenos Aires, Argentina |
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Abstract: | Twenty species of shrubbyOxalis species native in South America were arranged in six groups according to their karyotype similarities. The first group includes more than half of the species studied, all with 2n = 12 relatively small metacentric chromosomes. The rest of the species from the other groups has different basic chromosome numbers, and exhibits various degrees of chromosome asymmetry and size increase. These latter groups apparently have specialized to habitats with low light intensity such as the forest undergrowth in contrast to the frist group whose members live in open areas (i.e., grasslands, savannas etc.). |
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Keywords: | Oxalidaceae Oxalis sect Thamnoxys Chromosome numbers karyotype analyses variation geographical distribution Flora of South America |
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